1. When you need to release a breaking change—any breaking change—you do it in a major version. Period. No excuses.
2. You need to find a different way to communicate more significant project-wide changes and improvements. Major version numbers can’t do double duty as both breaking-change indicator and marketing hook.

About the second point, I would argue that giving an name is greater :D
Ubuntu uses it... Hahaha I read it as I write it.